code: def test_api_key_passed_directly(self):
      client.configure(api_key="AIzA_direct")
  
      client_opts = client._client_manager.client_config[
          "client_options"
      ]
      self.assertEqual(client_opts.api_key, "AIzA_direct")
  
file_path: generative-ai-python/tests/test_client.py
imports: import os
  from unittest import mock
  from absl.testing import absltest
  from absl.testing import parameterized
  from google.api_core import client_options
  import google.ai.generativelanguage
  from google.generativeai import client
label_desc: Use image node_id 2 for calling the ClientTests obj's underlying member method code with example usage: obj.test_api_key_passed_directly() without return types